Napora lomoalta Hull, 1997

Dumitrica, Paulian & Zügel, Peter, 2003, Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany), Geodiversitas 25 (1), pp. 5-72 : 61

Napora lomoalta Hull, 1997 ( Fig. 29A, B )

Napora sp. aff. pyramidalis – Kiessling 1995: pl. 60, figs 14, 15; 1999: 72, pl. 14, fig. 12.

Napora lomoalta Hull, 1997: 118 , pl. 45, figs 9, 21; pl. 46, figs 1, 16, 19, 21, 23.

MATERIAL EXAMINED. — 15 specimens from sample Mue 22.

OCCURRENCE. — Lower to upper Tithonian (Zone 4, Subzones 4 beta and alpha of Pessagno et al. 1993) in Antarctic Peninsula, Stanley Mountain, California Coast Ranges, and lower Tithonian ( Hybonotum Zone ) in Solnhofen area, Germany.

REMARKS

Some specimens herein assigned to this species resemble very well the holotype, others have a more robust thorax. Very few specimens have two to three small spines on the distal end of feet. All are pyramidal as the type specimens, with a well perforate subtriangular cephalis, and a massive apical horn at base, composed of several ridges which converge distally to form a more slender triradiate horn. Nodes of subsidiary spines are very weakly developed, as in the holotype, with two to three very small thorns in each node. Unlike the topotype, most of our specimens have a rather well preserved velum; it is triangular in cross-section, thin-walled, and as long as thorax. Some specimens have also one or two small spines on the distal end of some feet.

Figures

FIG. 29. — A, B, Napora lomoalta Hull, 1997; A, right lateral view; B, view from Ll; C, D, Napora matsuokai n. sp.; C, holotype, left lateral view; D, paratype, left lateral view; E-G, Napora modesta n. sp.; E, holotype, dorsal view; F, G, paratypes; F, dorsal view; G, view from Lr; H, I, Napora pacifica Kiessling, 1999; H, view from Ll; I, view from Lr; J, K, Napora pyramis n. sp.; J, holotype; K, paratype; L-N, Napora schaudibergensis n. sp.; L, M, paratypes; L, dorsal view; M, view from Ll; N, holotype, view from Lr; O, Napora sp., left lateral view. Abbreviations: Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A, H, I, M, N, 100 µm; B-G, J-L, O, 30 µm.